Ancient Naval Arsenal

Modeled on antiquity's great state shipyards — where powers like Carthage and Rome built their heaviest warships in dedicated facilities, separate from ordinary merchant shipbuilding — the Naval Arsenal combines two parallel slipways, a dry dock, and a ram-casting foundry under one roof. Noticeably larger than an ordinary shipyard, because a warship of this class needs more keel length, more shipwrights, and more time than any regular coastal yard could ever spare. In the game it trains the first heavy warships, freeing the ordinary shipyard from the single most expensive ship class.